drivers/isdn/hisax/jade.c

   1 /* $Id: jade.c,v 1.9.2.4 2004/01/14 16:04:48 keil Exp $
   2  *
   3  * JADE stuff (derived from original hscx.c)
   4  *
   5  * Author       Roland Klabunde
   6  * Copyright    by Roland Klabunde   <R.Klabunde@Berkom.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13
  14 #include <linux/init.h>
  15 #include "hisax.h"
  16 #include "hscx.h"
  17 #include "jade.h"
  18 #include "isdnl1.h"
  19 #include <linux/interrupt.h>
  20 #include <linux/slab.h>
  21
  22
  23 int
  24 JadeVersion(struct IsdnCardState *cs, char *s)
  25 {
  26     int ver;
  27     int to = 50;
  28     cs->BC_Write_Reg(cs, -1, 0x50, 0x19);
  29     while (to) {
  30         udelay(1);
  31         ver = cs->BC_Read_Reg(cs, -1, 0x60);
  32         to--;
  33         if (ver)
  34             break;
  35         if (!to) {
  36             printk(KERN_INFO "%s JADE version not obtainable\n", s);
  37             return (0);
  38         }
  39     }
  40     /* Wait for the JADE */
  41     udelay(10);
  42     /* Read version */
  43     ver = cs->BC_Read_Reg(cs, -1, 0x60);
  44     printk(KERN_INFO "%s JADE version: %d\n", s, ver);
  45     return (1);
  46 }
  47
  48 /* Write to indirect accessible jade register set */
  49 static void
  50 jade_write_indirect(struct IsdnCardState *cs, u_char reg, u_char value)
  51 {
  52     int to = 50;
  53     u_char ret;
  54
  55     /* Write the data */
  56     cs->BC_Write_Reg(cs, -1, COMM_JADE+1, value);
  57     /* Say JADE we wanna write indirect reg 'reg' */
  58     cs->BC_Write_Reg(cs, -1, COMM_JADE, reg);
  59     to = 50;
  60     /* Wait for RDY goes high */
  61     while (to) {
  62         udelay(1);
  63         ret = cs->BC_Read_Reg(cs, -1, COMM_JADE);
  64         to--;
  65         if (ret & 1)
  66             /* Got acknowledge */
  67             break;
  68         if (!to) {
  69             printk(KERN_INFO "Can not see ready bit from JADE DSP (reg=0x%X, value=0x%X)\n", reg, value);
  70             return;
  71         }
  72     }
  73 }
  74
  75
  76
  77 static void
  78 modejade(struct BCState *bcs, int mode, int bc)
  79 {
  80     struct IsdnCardState *cs = bcs->cs;
  81     int jade = bcs->hw.hscx.hscx;
  82
  83     if (cs->debug & L1_DEB_HSCX) {
  84         char tmp[40];
  85         sprintf(tmp, "jade %c mode %d ichan %d",
  86                 'A' + jade, mode, bc);
  87         debugl1(cs, tmp);
  88     }
  89     bcs->mode = mode;
  90     bcs->channel = bc;
  91
  92     cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (mode == L1_MODE_TRANS ? jadeMODE_TMO:0x00));
  93     cs->BC_Write_Reg(cs, jade, jade_HDLC_CCR0, (jadeCCR0_PU|jadeCCR0_ITF));
  94     cs->BC_Write_Reg(cs, jade, jade_HDLC_CCR1, 0x00);
  95
  96     jade_write_indirect(cs, jade_HDLC1SERRXPATH, 0x08);
  97     jade_write_indirect(cs, jade_HDLC2SERRXPATH, 0x08);
  98     jade_write_indirect(cs, jade_HDLC1SERTXPATH, 0x00);
  99     jade_write_indirect(cs, jade_HDLC2SERTXPATH, 0x00);
 100
 101     cs->BC_Write_Reg(cs, jade, jade_HDLC_XCCR, 0x07);
 102     cs->BC_Write_Reg(cs, jade, jade_HDLC_RCCR, 0x07);
 103
 104     if (bc == 0) {
 105         cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAX, 0x00);
 106         cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAR, 0x00);
 107     } else {
 108         cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAX, 0x04);
 109         cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAR, 0x04);
 110     }
 111     switch (mode) {
 112         case (L1_MODE_NULL):
 113                 cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, jadeMODE_TMO);
 114                 break;
 115         case (L1_MODE_TRANS):
 116                 cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (jadeMODE_TMO|jadeMODE_RAC|jadeMODE_XAC));
 117                 break;
 118         case (L1_MODE_HDLC):
 119                 cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (jadeMODE_RAC|jadeMODE_XAC));
 120                 break;
 121     }
 122     if (mode) {
 123         cs->BC_Write_Reg(cs, jade, jade_HDLC_RCMD, (jadeRCMD_RRES|jadeRCMD_RMC));
 124         cs->BC_Write_Reg(cs, jade, jade_HDLC_XCMD, jadeXCMD_XRES);
 125         /* Unmask ints */
 126         cs->BC_Write_Reg(cs, jade, jade_HDLC_IMR, 0xF8);
 127     }
 128     else
 129         /* Mask ints */
 130         cs->BC_Write_Reg(cs, jade, jade_HDLC_IMR, 0x00);
 131 }
 132
 133 static void
 134 jade_l2l1(struct PStack *st, int pr, void *arg)
 135 {
 136     struct BCState *bcs = st->l1.bcs;
 137     struct sk_buff *skb = arg;
 138     u_long flags;
 139
 140     switch (pr) {
 141         case (PH_DATA | REQUEST):
 142                 spin_lock_irqsave(&bcs->cs->lock, flags);
 143                 if (bcs->tx_skb) {
 144                         skb_queue_tail(&bcs->squeue, skb);
 145                 } else {
 146                         bcs->tx_skb = skb;
 147                         test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 148                         bcs->hw.hscx.count = 0;
 149                         bcs->cs->BC_Send_Data(bcs);
 150                 }
 151                 spin_unlock_irqrestore(&bcs->cs->lock, flags);
 152                 break;
 153         case (PH_PULL | INDICATION):
 154                 spin_lock_irqsave(&bcs->cs->lock, flags);
 155                 if (bcs->tx_skb) {
 156                         printk(KERN_WARNING "jade_l2l1: this shouldn't happen\n");
 157                 } else {
 158                         test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 159                         bcs->tx_skb = skb;
 160                         bcs->hw.hscx.count = 0;
 161                         bcs->cs->BC_Send_Data(bcs);
 162                 }
 163                 spin_unlock_irqrestore(&bcs->cs->lock, flags);
 164                 break;
 165         case (PH_PULL | REQUEST):
 166                 if (!bcs->tx_skb) {
 167                     test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 168                     st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
 169                 } else
 170                     test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 171                 break;
 172         case (PH_ACTIVATE | REQUEST):
 173                 spin_lock_irqsave(&bcs->cs->lock, flags);
 174                 test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
 175                 modejade(bcs, st->l1.mode, st->l1.bc);
 176                 spin_unlock_irqrestore(&bcs->cs->lock, flags);
 177                 l1_msg_b(st, pr, arg);
 178                 break;
 179         case (PH_DEACTIVATE | REQUEST):
 180                 l1_msg_b(st, pr, arg);
 181                 break;
 182         case (PH_DEACTIVATE | CONFIRM):
 183                 spin_lock_irqsave(&bcs->cs->lock, flags);
 184                 test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
 185                 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 186                 modejade(bcs, 0, st->l1.bc);
 187                 spin_unlock_irqrestore(&bcs->cs->lock, flags);
 188                 st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
 189                 break;
 190     }
 191 }
 192
 193 static void
 194 close_jadestate(struct BCState *bcs)
 195 {
 196     modejade(bcs, 0, bcs->channel);
 197     if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
 198         kfree(bcs->hw.hscx.rcvbuf);
 199         bcs->hw.hscx.rcvbuf = NULL;
 200         kfree(bcs->blog);
 201         bcs->blog = NULL;
 202         skb_queue_purge(&bcs->rqueue);
 203         skb_queue_purge(&bcs->squeue);
 204         if (bcs->tx_skb) {
 205                 dev_kfree_skb_any(bcs->tx_skb);
 206                 bcs->tx_skb = NULL;
 207                 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 208         }
 209     }
 210 }
 211
 212 static int
 213 open_jadestate(struct IsdnCardState *cs, struct BCState *bcs)
 214 {
 215         if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
 216                 if (!(bcs->hw.hscx.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
 217                         printk(KERN_WARNING
 218                                "HiSax: No memory for hscx.rcvbuf\n");
 219                         test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
 220                         return (1);
 221                 }
 222                 if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
 223                         printk(KERN_WARNING
 224                                 "HiSax: No memory for bcs->blog\n");
 225                         test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
 226                         kfree(bcs->hw.hscx.rcvbuf);
 227                         bcs->hw.hscx.rcvbuf = NULL;
 228                         return (2);
 229                 }
 230                 skb_queue_head_init(&bcs->rqueue);
 231                 skb_queue_head_init(&bcs->squeue);
 232         }
 233         bcs->tx_skb = NULL;
 234         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 235         bcs->event = 0;
 236         bcs->hw.hscx.rcvidx = 0;
 237         bcs->tx_cnt = 0;
 238         return (0);
 239 }
 240
 241
 242 static int
 243 setstack_jade(struct PStack *st, struct BCState *bcs)
 244 {
 245         bcs->channel = st->l1.bc;
 246         if (open_jadestate(st->l1.hardware, bcs))
 247                 return (-1);
 248         st->l1.bcs = bcs;
 249         st->l2.l2l1 = jade_l2l1;
 250         setstack_manager(st);
 251         bcs->st = st;
 252         setstack_l1_B(st);
 253         return (0);
 254 }
 255
 256 void
 257 clear_pending_jade_ints(struct IsdnCardState *cs)
 258 {
 259         int val;
 260         char tmp[64];
 261
 262         cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR, 0x00);
 263         cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR, 0x00);
 264
 265         val = cs->BC_Read_Reg(cs, 1, jade_HDLC_ISR);
 266         sprintf(tmp, "jade B ISTA %x", val);
 267         debugl1(cs, tmp);
 268         val = cs->BC_Read_Reg(cs, 0, jade_HDLC_ISR);
 269         sprintf(tmp, "jade A ISTA %x", val);
 270         debugl1(cs, tmp);
 271         val = cs->BC_Read_Reg(cs, 1, jade_HDLC_STAR);
 272         sprintf(tmp, "jade B STAR %x", val);
 273         debugl1(cs, tmp);
 274         val = cs->BC_Read_Reg(cs, 0, jade_HDLC_STAR);
 275         sprintf(tmp, "jade A STAR %x", val);
 276         debugl1(cs, tmp);
 277         /* Unmask ints */
 278         cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR, 0xF8);
 279         cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR, 0xF8);
 280 }
 281
 282 void
 283 initjade(struct IsdnCardState *cs)
 284 {
 285         cs->bcs[0].BC_SetStack = setstack_jade;
 286         cs->bcs[1].BC_SetStack = setstack_jade;
 287         cs->bcs[0].BC_Close = close_jadestate;
 288         cs->bcs[1].BC_Close = close_jadestate;
 289         cs->bcs[0].hw.hscx.hscx = 0;
 290         cs->bcs[1].hw.hscx.hscx = 1;
 291
 292         /* Stop DSP audio tx/rx */
 293         jade_write_indirect(cs, 0x11, 0x0f);
 294         jade_write_indirect(cs, 0x17, 0x2f);
 295
 296         /* Transparent Mode, RxTx inactive, No Test, No RFS/TFS */
 297         cs->BC_Write_Reg(cs, 0, jade_HDLC_MODE, jadeMODE_TMO);
 298         cs->BC_Write_Reg(cs, 1, jade_HDLC_MODE, jadeMODE_TMO);
 299         /* Power down, 1-Idle, RxTx least significant bit first */
 300         cs->BC_Write_Reg(cs, 0, jade_HDLC_CCR0, 0x00);
 301         cs->BC_Write_Reg(cs, 1, jade_HDLC_CCR0, 0x00);
 302         /* Mask all interrupts */
 303         cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR,  0x00);
 304         cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR,  0x00);
 305         /* Setup host access to hdlc controller */
 306         jade_write_indirect(cs, jade_HDLCCNTRACCESS, (jadeINDIRECT_HAH1|jadeINDIRECT_HAH2));
 307         /* Unmask HDLC int (don't forget DSP int later on)*/
 308         cs->BC_Write_Reg(cs, -1,jade_INT, (jadeINT_HDLC1|jadeINT_HDLC2));
 309
 310         /* once again TRANSPARENT */
 311         modejade(cs->bcs, 0, 0);
 312         modejade(cs->bcs + 1, 0, 0);
 313 }
 314